This was causing see_cell to fail for cells at the edge of LOS.
LDERGLCJGAEOY23VTEJU7UPB67SFO44Y3RX5474UW42MGQTVXPFQC
TQXNC2YQVJZXBPSLDEANMM2EDGHTH4DSN74OJIRMUF7D46SESHZAC
ACZYEIX7WMPIIODKCATBCUE626AJ4ZGGBOMVC6BGXM27EQU2RECAC
if (ip.rdist() < ENV_SHOW_OFFSET)
if (ip.rdist() <= ENV_SHOW_OFFSET)
return ((crawl_state.arena || crawl_state.arena_suspended)
return (((crawl_state.arena || crawl_state.arena_suspended)
|| see_cell(env.show, you.pos(), p);
|| see_cell(env.show, you.pos(), p));